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5b1e106d87
This switches to using the CMake FetchContent path to dynamically download and build PCRE2, allowing us to drop the vendored sources. The FISH_USE_SYSTEM_PCRE2 CMake option is kept, but if false it now means fetch-and-build PCRE2 rather than building vendored sources. Note FetchContent was introduced in CMake 3.11. That is now a prerequisite for building fish with FISH_USE_SYSTEM_PCRE2 disabled.
71 lines
2.8 KiB
CMake
71 lines
2.8 KiB
CMake
# PCRE2 needs some settings.
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set(PCRE2_WIDTH ${WCHAR_T_BITS})
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set(PCRE2_BUILD_PCRE2_8 OFF CACHE BOOL "Build 8bit PCRE2 library")
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set(PCRE2_BUILD_PCRE2_${PCRE2_WIDTH} ON CACHE BOOL "Build ${PCRE2_WIDTH}bit PCRE2 library")
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set(PCRE2_SHOW_REPORT OFF CACHE BOOL "Show the final configuration report")
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set(PCRE2_BUILD_TESTS OFF CACHE BOOL "Build tests")
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set(PCRE2_BUILD_PCRE2GREP OFF CACHE BOOL "Build pcre2grep")
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set(PCRE2_MIN_VERSION 10.21)
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# Look for a system-installed PCRE2.
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find_library(SYS_PCRE2_LIB pcre2-${PCRE2_WIDTH})
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find_path(SYS_PCRE2_INCLUDE_DIR pcre2.h)
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# We can either use the system-installed PCRE or our bundled version.
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# This is controlled by the cache variable FISH_USE_SYSTEM_PCRE2.
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# Here we compute the default value for that variable.
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if ((APPLE) AND (MAC_CODESIGN_ID))
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# On Mac, a codesigned fish will refuse to load a non-codesigned PCRE2
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# (e.g. from Homebrew) so default to bundled PCRE2.
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set(USE_SYS_PCRE2_DEFAULT OFF)
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elseif((NOT SYS_PCRE2_LIB) OR (NOT SYS_PCRE2_INCLUDE_DIR))
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# We did not find system PCRE2, so default to bundled.
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set(USE_SYS_PCRE2_DEFAULT OFF)
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else()
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# Default to using the system PCRE2, which was found.
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set(USE_SYS_PCRE2_DEFAULT ON)
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endif()
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set(FISH_USE_SYSTEM_PCRE2 ${USE_SYS_PCRE2_DEFAULT} CACHE BOOL
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"Use PCRE2 from the system, instead of fetching and building it")
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if(FISH_USE_SYSTEM_PCRE2)
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set(PCRE2_LIB "${SYS_PCRE2_LIB}")
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set(PCRE2_INCLUDE_DIR "${SYS_PCRE2_INCLUDE_DIR}")
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message(STATUS "Using system PCRE2 library ${PCRE2_INCLUDE_DIR}")
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else()
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include(FetchContent RESULT_VARIABLE HAVE_FetchContent)
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if (${HAVE_FetchContent} STREQUAL "NOTFOUND")
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message(FATAL_ERROR "Please install PCRE2 headers, or CMake >= 3.11 so I can download PCRE")
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endif()
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set(CMAKE_TLS_VERIFY true)
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set(PCRE2_REPO "https://github.com/PhilipHazel/pcre2.git")
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message(STATUS "Fetching and configuring PCRE2 from ${PCRE2_REPO}")
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Set(FETCHCONTENT_QUIET FALSE)
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FetchContent_Declare(
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pcre2
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GIT_REPOSITORY ${PCRE2_REPO}
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GIT_TAG "72669190cb947f0cac1d038a8bb1820da59ef447" # tag: pcre2-10.36
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GIT_PROGRESS TRUE
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)
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# Don't try FetchContent_MakeAvailable, there's no way to add EXCLUDE_FROM_ALL
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# so we end up installing all of PCRE2 including its headers, man pages, etc.
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FetchContent_GetProperties(pcre2)
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if (NOT pcre2_POPULATED)
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FetchContent_Populate(pcre2)
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add_subdirectory(${pcre2_SOURCE_DIR} ${pcre2_BINARY_DIR} EXCLUDE_FROM_ALL)
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endif()
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set(PCRE2_INCLUDE_DIR ${pcre2_BINARY_DIR})
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set(PCRE2_LIB pcre2-${PCRE2_WIDTH})
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# Disable -Wunused-macros inside PCRE2, as it is noisy.
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get_target_property(PCRE2_COMPILE_OPTIONS ${PCRE2_LIB} COMPILE_OPTIONS)
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list(REMOVE_ITEM PCRE2_COMPILE_OPTIONS "-Wunused-macros")
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set_property(TARGET ${PCRE2_LIB} PROPERTY COMPILE_OPTIONS ${PCRE2_COMPILE_OPTIONS})
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endif(FISH_USE_SYSTEM_PCRE2)
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include_directories(${PCRE2_INCLUDE_DIR})
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